US6054683AExpiredUtility

Cartridge heater for a gas chromatography transfer device

58
Assignee: GERSTEL GMBH & CO KGPriority: Apr 17, 1998Filed: Apr 16, 1999Granted: Apr 25, 2000
Est. expiryApr 17, 2018(expired)· nominal 20-yr term from priority
Inventors:Ralf BremerBernhard Rose
G01N 30/30
58
PatentIndex Score
21
Cited by
10
References
10
Claims

Abstract

The invention relates to a cartridge heater for a gas chromatography transfer device for substances which are to be analyzed, having a metal tube for accommodating a tube section to be heated and a heating coil arranged outside the metal tube, the metal tube bearing, on the outside, a groove which corresponds to the shape of the heating coil and in which a heating conductor is embedded in an electrically insulated manner with respect to the metal tube.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A cartridge heater for a gas chromatography transfer device for substances which are to be analyzed, comprising: a metal tube for accommodating a tube section to be heated; and   a heating coil arranged outside the metal tube;   wherein the metal tube bears, on the outside, a groove which corresponds to the shape of the heating coil and in which a heating conductor is embedded in an electrically insulated manner with respect to the metal tube.   
     
     
       2. The cartridge heater of claim 1, in which the metal tube is provided with an electrically insulating coating on the outside. 
     
     
       3. The cartridge heater of claim 2, in which the electrically insulating coating is a layer of oxide. 
     
     
       4. The cartridge heater of claim 1, in which the heating conductor is a heating wire which bears an electrically insulating sheathing. 
     
     
       5. The cartridge heater of claim 1, in which the heating conductor is cemented into the groove. 
     
     
       6. The cartridge heater of claim 1, in which the groove is in serpentine form. 
     
     
       7. The cartridge heater of claim 1, in which the free ends of the heating conductor are situated at one end of the cartridge heater. 
     
     
       8. The cartridge heater of claim 1, in which the winding density of the heating conductor over the length of the metal tube is adapted to the heating capacity required. 
     
     
       9. The cartridge heater of claim 1, in which a thermocouple is arranged on the metal tube, as a temperature sensor. 
     
     
       10. The cartridge heater of claim 1, in which an outer sleeve is provided as a casing.

Cited by (0)

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References (0)

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